LACK OF FUEL UNDER LOAD

[chaz923]

STALLS UNDER LOAD UNLESS I RUN AT 1/2 CHOKE.

My B&S 18 hp engine died and I repaced it with another identical engine which came from an identical mower.

This mower has a single down draft carb.

It runs fine at idle.
I can only mow if I keep the choke about .5 on.

The bowl was clean and float appeared to be working.
Fuel filter was new last year.

Any suggestions appreciated.

Thanks

Chuck

 

[ILENGINE]

Partially clogged high speed circuit of carb possibly. You did give us the model number of the engine, so I can only speculate which style of carb you have.

 

[chance123]

I see you are in California. What is your elevation? I am in the Inland Empire and do service for the Mount Baldy fire department (high elevation) and had to re jet some of their 4 st engines. They seem to starve for fuel a lot under load. Working with B & S to solve this problem when their other service center could not resolve it, secured me the service contract with Mt Baldy FD

 

[chaz923]

I see you are in California. What is your elevation? I am in the Inland Empire and do service for the Mount Baldy fire department (high elevation) and had to re jet some of their 4 st engines. They seem to starve for fuel a lot under load. Working with B & S to solve this problem when their other service center could not resolve it, secured me the service contract with Mt Baldy FD

I am about 150 feet off the ocean in NW Krazyfornia.

Put on a new fuel filter, cleaned and blew the carb with compressed air, changes out the plugs.

Carb cleaning made little difference.
I think the plugs were a big part of the issue.

Chuck

 

[chance123]

I am about 150 feet off the ocean in NW Krazyfornia.

Put on a new fuel filter, cleaned and blew the carb with compressed air, changes out the plugs.

Carb cleaning made little difference.
I think the plugs were a big part of the issue.

Chuck

Ok you should be OK in the jet dept.